[RFI] RFI from solar system and inverters ....sma inverters

[Hare, Ed W1RFI]

Under FCC rules, the device must meet radiated emissions limits about 30 MHz.  They are high enough that if a neighbor's device just meets the rules, you could typically see about an S7 signal or noise level.

The solar systems must also meet conducted emissions limits below 30 MHz. These apply ONLY to the noise conducted onto the AC mains. There are no conducted limits on other long wires going to the panels, etc.

The European regulations are similar, so the German system is simply an excellent one.

Ed



-----Original Message-----
From: RFI <rfi-bounces+w1rfi=arrl.org at contesting.com> On Behalf Of Bill Steffey
Sent: Wednesday, February 5, 2020 10:15 AM
To: cqtestk4xs at aol.com; rfi at contesting.com
Subject: Re: [RFI] RFI from solar system and inverters ....sma inverters

Hi Bill,

from my QRZ site you can see my 10KW installation out in the yard. ( zzzom in on the detail satellite map page pix)

The SolarWorld panels connect to 2     5 KW SMA inverters,,, 5000TL which are transformerless. These replaced 2  # 5000 units which became damaged with a nearby lightning strike, induced into the long data lines. I replaced the data lines with a wifi link eliminating the long ""antenna" into my data network.

Prior to purchase I took my kenwood tf6a on broadcast band ( it has builtin loop ant)  and visited two sites with the proposed equipment. 
ONLY when I got within INCHES of the SMA units, did I hear anything.

The German designed units are QUITE QUIET. I'm beginning to think the CE certification must mean something, as opposed to the meaningless FCC mark.

When there is a quiet unit available, why not use that one ????



On 2/4/2020 6:10 AM, Bill via RFI wrote:
> Considering a parcel of land  whioh will require an extensive solar panel system and of course an inverter.
> This is my first foray into solar and looking for info on which brand to look for, which ones to avoid.  Also any info on how to avoid RFI from the systems.  Any other info will be greatly appreciated.
> 73  Bill  KH7XS/K4XS
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